Tidy docs/code left over from `repo-server-bootstrap-ncl-issue-20` migration

[chrisjsimpson]

Is your feature request related to a problem? Please describe.

Describe the solution you'd like

Now that migration of repo #27 is complete, the docs, readme and code now in folder repo-server-bootstrap-ncl-issue-20 needs to be tidied/organised

Describe alternatives you've considered

Additional context